USCGC BRISTOL BAY

WTGB 102/CGB 12001

Barge Evolution: Separation, Towing, and Reconnection

When combined with its companion barge, the Bristol Bay will normally be
pushing the barge ahead.
In certain sea conditions, however, it may become necessary to shift the barge
to a towed configuration.
This would generally be done when wave height reached the point where the
bow-notch joining of the tug and barge became unstable.
Since strong sea conditions like that would require excellent seamanship
when handling the separation and joining of the barge and tug,
the crew practices this manuever from time to time.
Since there is a continual rotation of personnel aboard, many new crew members have
not yet participated in the manuever, and so today, in the relative calm of
Lake St. Clair, the Bristol Bay will shift from pushing the barge to towing it,
and then resume the barge-ahead configuration.

Before breaking free from the barge, all electrical connections have to be broken
between the two vessels.
At the bow of the tug, many control cables and power lines are disconnected
and hauled back aboard the barge.
The barge switches over to her own power generators at this time.

The barge and tug are prepared to separate, and now all that remains is to break the
main cables that bind the stern corners of the barge to the aft quarters of the tug.
This link is made from a combination of very large synthetic rope, approximately three inches
in diameter, and steel cable, itself over an inch in diameter.
An oversized pelican hook is the point of disconnection.
On signal from the bridge, crewmen on either side use sledgehammers to
release the pelican hook.
After release, the large block and tackle on the tug will retain her gear in position.
The camera's shutter has just beaten the sledge hammer by a fraction of a second, as
the mate swings his mallet to open the pelican hook.

Under her own momentum, the barge drifts ahead as the Bristol Bay backs away from her.
Several crewmen remain on the barge, where they retreive the big lines using winches.
Next, the tug will circle around to the bow of the barge.
A messenger line will be sent over, and the towing line from the tug's stern winch will
be hauled aboard the barge and made fast to her towing bridle.

Several hundred yards astern, the barge is taken in tow by the Bristol Bay .
A short time later, the tow line is retreived, and the tug manuevers herself back into
the notch in the stern of the barge.
This requires some excellent ship handling to accomplish, even in the small waves the
Lake St. Clair.
The Bristol Bay can maintain herself in the notch by pushing ahead, while the
deck crew restores the main cables between the two vessels.

The Chief Bosun Mate signals over to the crew on the barge that he needs more slack
in their winch line in order to make the line fast to the pelican hook tackle on the
tug.
That huge synthetic fiber rope is not easy to manhandle, and getting the
loop and shackle back into the jaw of the pelican clamp is at least a two-man job.
The tug is steaming at 8-10 knots to maintain the barge notch position.
The Chief is not happy that it has taken this long to re-link, but
that is, of course, the reason for the drill: to improve
the crew's efficiency at this crucial maneuver.